Ol Donyo Sabuk (in Kikuyu, Kilimambogo, Kilima Mbogo) is a mountain and an adjacent small town in Thika central Kenya. The peak, height 2,145 metres (7,037 ft), was named by Maasai pastoralists, meaning big mountain. The Swahili name, Kilima Mbogo, means Buffalo Hill or Mountain. The town stands at the border Machakos District and Thika District. Lord Macmillan was the first white man to settle here, and everything else that has happened since is largely attributed to him (see below: Lord William Northrop Macmillan). The town is quite dusty, due to deforestation and loose ground cover, compounded by occasional rainfall. However, the area is adorned with lots of untamed beauty.
The town is located about 18.5 km (11.5 mi) east-southeast of Thika, along the Thika-Garissa road (A3 road). Driving on Garissa Road from Thika town, there are pineapple plantations on both sides, accentuated by little pockets of blooming eucalyptus. About 18 kilometres (11 mi) east of Thika, there is a junction going south, with Kenya Wildlife Service markings. It will be a 3-kilometre (1.9 mi) drive from here to the famous Fourteen Falls, described as one of Kenya's most spectacular landmarks. By the river is Kilimambogo Teachers College, and Immaculate Heart of Mary mission hospital. Donyo Sabuk town is a kilometre (half-mile) away from Fourteen Falls, just across the Athi River, with a junction leading to the game park, and the other to the great house of Donyo Sabuk.